Display screen or portion thereof with an animated graphical user interface



FIG. 1 is a front view of a display screen or portion thereof with an animated graphical user interface showing a first image in the sequence showing the new design.

FIG. 2 is a second image thereof; and,

FIG. 3 is a third image thereof.

The broken lines in the FIGS. showing display screens, portions of display screens, text, and graphical elements form no part of the claimed design.

The appearance of the animated images sequentially transitions between the images shown in FIGS. 1-3. The process or period in which one image transitions to another image forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with an animated graphical user interface, as shown and described. 